function switchTab(ProTag, ProBox) {
            for (i = 1; i < 4; i++) {
                if ("tab" + i == ProTag) {
                    document.getElementById(ProTag).className = "on";
                } else {
                    document.getElementById("tab" + i).className = "";
                }
                if ("con" + i == ProBox) {
                    document.getElementById(ProBox).style.display = "block";
                } else {
                    document.getElementById("con" + i).style.display = "none";
                }
            }
        }